/Engine/Plugins/Experimental/Web/WebAPI/Source/WebAPI/Public/WebAPITypes.h
Video.
namespace UE { namespace WebAPI { namespace MimeType { static const [FName](API\Runtime\Core\UObject\FName) UE::WebAPI::MimeType::NAME_Avi = FName(TEXT("video/msvideo, video/avi, video/x-msvideo")); } } }